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Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model

Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model. Özkan Karabacak Neslihan Serap Şengör İ.T.Ü. Elektrik-Elektronik Fakültesi Devreler ve Sistemler A.B.D. Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model. Dinamik model nedir?

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Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model

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  1. Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model Özkan Karabacak Neslihan Serap Şengör İ.T.Ü. Elektrik-Elektronik Fakültesi Devreler ve Sistemler A.B.D.

  2. Davranış seçme işlevinde dopaminin etkisine ilişkin dinamik bir model • Dinamik model nedir? • C-BG-TH döngüsünü nasıl modelleyeceğiz? • Biraz da matematik gerekmiyor mu? • Davranmanın dinamik modelini nasıl oluşturduk? • Davranış seçme işlevinin dinamik modelini nasıl elde ettik? • Bu modeli Stroop testi için nasıl kullandık? • Ne elde ettik, nasıl yorumladık?

  3. Dinamik Model • Amacımız, bilişsel süreçler nasıl oluşuyor, neden oluşuyor anlamak. • İki yol tutabilirdik...... * hücre seviyesi * sistem seviyesi • Ama biz.......

  4. Korteks arttırıcı azaltıcı SNc Striatum D1D2 STN GPi/SNr GPe Talamus Bazal Çekirdekler Korteks-Bazal Çekirdekler-Talamus Döngüsü

  5. arttırıcı azaltıcı korteks STN STR Talamus Bazal Çekirdekler GPi/SNr Korteks-Bazal Çekirdekler-Talamus Döngüsü

  6. Kim demiş “nigrostriatal dopamin sistemi bilişsel işlevleri de etkiler” diye? •Horvitz, J.C., (2000) “Mesolimbocortical and nigrostriatal dopamine responses to salient non-reward events”, Neuroscience, 96, 651-656. •Monchi,O., Petrides M., Doyon, J., Postuma,R.B., Worsley, K., & Dagher, A., (2004) “Neural Bases of Set-Shifting Deficits in Parkinson's Disease”. The Journal of Neuroscience,  24, 702-710. •Djurfeldt M., Ekeberg Ö., &Graybiel A.M., (2001) “Cortex-basal ganglia interaction and attractor states”. Neurocomputing, 38-40, 573-579.

  7. w u f(u) Geri beslemeli sinir hücresi Biraz da Matematik

  8. Biraz daha matematik dallanma diyagramları

  9. Korteks(p) BASAL GANGLIA STR(r) Talamus(m) STN(n) GPi/SNr(d) C-BG-TH-C çevrimi Şimdi de davranış AZALTICI BAĞLANTILAR ARTTIRICI BAĞLANTILAR Bir hücrenin aktivasyon fonksiyonu ve doyma bölgeleri

  10. … yapılıyor mu, yapılmıyor mu?

  11. İki davranışdan birini nasıl seçeriz?

  12. İki davranışdan birini nasıl seçeriz? θ = 0.7

  13. İki davranışdan birini nasıl seçeriz? θ = 1

  14. İki davranışdan birini nasıl seçeriz? θ = 1.3

  15. Korteks BASAL GANGLIA STR Talamus STN GPi/SNr C-BG-TH-C çevrimi Stroop testi için ne yaptık?

  16. Ne elde ettik ….. θ = 0.6

  17. Ne elde ettik ……. θ = 1

  18. Ne elde ettik ……. θ = 1.2

  19. ....nasıl yorumladık?

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  24. teşekkürler

  25. Daha fazla denklem isterseniz

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